Questions tagged [cisco]
The major provider of networking equipment. This is a generic tag to be used when no more specific tags are available. See the list of tags in Help Center Tag page.
3,719
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Understanding Cisco MIBs [closed]
I have setup my Cisco C9300 switches to send SNMP V3 traps to my log server as a backup for syslog. When it sends messages it just sends numbers with no actual message. I know I need some MIB files ...
- 461
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CISCO PACKET TRACER "INVALID IP ADDRESS"
Hi I am still new and studying about networks have here 234.1.18.6/29 address and mask but when I try it out on Packet tracer it gets me an invalid message. I cannot understand why this address are ...
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Is there a comparable technology to Cisco's DTP from other network vendors?
Is there a substitute for Cisco DTP technology from other vendors? And if so, which ones?
Didn't find anything on google.
- 79.8k
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2
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414
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Breakout from 400Gbps to n*25Gbps
My servers are currently have 25Gbps NIC, but switch ( Cisco Nexus 9300 series) has only 400Gbps.
I would like to be able to break out the 400Gbps connection into four 25Gbps connections. Is this ...
- 79.8k
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Web Access Certs No Secure Though It Is
I have a Cisco C9300 and I am securing the access to the web console to it with the HTTPS server. I created a trustpoint for our CA and imported the CA cert as well as created a certificate for this ...
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21
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cisco business dashboard probe scanning outside of given range
we're deploying Cisco business dashboard with dedicated probe server in our LAN.
I've managed to make everything work, but one thing bothers me.
I configured the probe managed network to only discover ...
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11
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NAT configuration behind pppoe with virtual server
my CISCO 3625 router is handling pppoe, NAT, and DHCP server..
My local LAN is 192.168.1.x and it's behind that NAT.
I'm trying to enable access to a DNS server that's on this LAN (192.168.1.191 tcp/...
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29
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Can I update a Cisco RV320 v03 to v04?
I bought a Cisco RV320 dual-WAN Gigabit VPN router that keeps freezing after about 12 hours or so of use. On the System Summary page, it shows that it is a RV320-K9 v03, firmware version 1.3.2.02. I ...
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5
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PAT and Static NAT not working together?
The HQ network is using PAT to gain access to the internet, the internal webserver needs to be accessed from the internet using static NAT.
Configs:
S_HQ
!
interface FastEthernet0/1
switchport ...
CommunityBot
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1
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How do I split static IPs from an ISP for separate usage?
I have a lot of IT experience/consulting, but want to test what I have done against some of the real experts hre in the networking field so I can keep learning and do what's best.
I have ISPs with 5 ...
CommunityBot
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HSRP and DHCP problem
I have 2 layer 3 switches DS1 and DS2. There are the same VLANs but different IP addresses on VLAN interfaces.
On DS1:
VLAN 10: 192.168.10.1/24
VLAN 20: 192.168.20.1/24
On DS2:
VLAN 10: 192.168.10.2/...
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1
answer
74
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Why No Ping When Use Static and RIP in This Network?
I am a learner. I learned somewhere that we could use static and dynamic routing in the network.
I built the simple network shown in the attached picture.
I configured router8 with static routes to ...
CommunityBot
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1
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Cisco 4500x configure fast-hello interface with multiple ports
I have a pair of cisco 4500x-32 and i configured VSS between then but i am using just 1x 10G interface for fast-hello packet and here is that interface configuration:
interface TenGigabitEthernet1/1/2
...
- 1,568
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2
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320
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Question about subinterface DHCP relay CISCO
I want to make 4 PC got DHCP IP address
No problem with left side, but right side 2 PC can't get IP automaitic. I think the problem is DHCP Relay.
How can I use ip helper-address for subinterface of ...
CommunityBot
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34
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MODBUS TCP server with CISCO C-9300
I am planning to use the MODBUS TCP Server with the C9300 switches. Yet, I found the following guide:
CIP and MODBUS Configuration Guide, Cisco Catalyst IE3x00 and IE3100 Rugged, IE3400 Heavy Duty, ...
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Cisco triangle network with static routing not working
I have this network
when the network tries to communicate with the routers it fails.
I have already tried everything in my power without success.
how to assign ip addresses in routing
I have been ...
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2
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Cisco IOS - how can I make the guestshell be reachable via VRF?
I am currently trying to set up a cloud application on the guestshell of an ISR4331. It installs a connector that needs to have connectivity to the internet. I assume the issue is not specific to what ...
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1
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241
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Cisco IOS XE DHCP Starlink - Static route issue
Today i connected the Starlink dish to an Cisco ISO-XE Box (ISR1111) as a secondary wan link and noticed some strange behavior.
I installed a static host-Route to an VPN Tunnel endpoint via
ip route x....
CommunityBot
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1
answer
83
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Cisco 9500 switch stack
I have a cisco 9500 switch that is live/up in productions but I need assistance or more information on how to add a few more switches to create a switch stack and would like to be pointed in the right ...
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188
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SSH Config on Nexus Switch
Having trouble configuring SSH on 2 Fiber Channel Switches (NX-OS). Any Cisco experts here that can help?
I am pretty new with Cisco and having trouble looking for documentation on SSH config for ...
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Connect site-to-site private networks [closed]
I used VPN to connect site-to-site private networks from A to B. It worked fine. Then I used NAT for (1) hiding private networks and (2) LAN of 2 sites could access the Internet. The problem is that ...
- 8,410
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Cisco DNAC - case insensitive search
Is there a way to do a case insensitive search using the Cisco DNA api?
Desired results: devices named “TEST”, “test”, “Test” etc
import request
url = "https:///dna/intent/api/v1/network-device?...
CommunityBot
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532
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HP 6120XG switch LACP is blocked - error condition
Folks,
I am dealing with very strange issue related LACP and not sure if its bug of 6120XG switch or something else. so let me explain my issue here.
Network Diagram:
I have two Cisco Nexus 9396PX ...
CommunityBot
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2
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1
answer
7k
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Packet Tracer: Ethernet interface up/down
I found that different interfaces have different behaviour on different device (router, switch) when no cable is attached on Packet Tracer 6.0.1.0011.
Router's serial : down down
Router's ethernet: ...
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1
answer
58
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What Is The Difference Between OSPF Neighbors And Directly Connected Routers?
I have read somewhere that:
OSPF router’s neighbors are usually the routers directly connected to
it through its interfaces, from a layer-3 perspective. However, there
are some exceptions, such as ...
- 1,568
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votes
1
answer
151
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link asa with core switch to wlc
have 4 switch 3560 POE-8 , 2 of them have been RESET, AND w l c 2100 RESET too, but there are firewall AND ONE switch. Keeps the OLD CONFIG. I try to restore the network to the same old ...
CommunityBot
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1
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Best Practices for Configuring Port Security on a Layer 2 Switch
How to configure port security on trunk and interfaces
I'm learning about port security and have a few questions. I have a layer 2 switch with interfaces f0/1-22 in access mode to access VLANs, ...
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1
answer
43
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Understanding the Role of Member Device in Cisco 3850 VSS Stack
Clarifying the Role of Member Device in VSS Domain Configuration
I am trying to understand the role of a device in a VSS domain as a "member."
What does it mean for a device to be a member?
...
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28
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How to allow cisco to log on to a specific ip port using nat
Good afternoon, I use Cisco 7201
I create a network on the gi0/0 interface connecting to a dhcp provider and get a static ip address, also on the gi0/1 interface I create a network where my 5 servers ...
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0
answers
29
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Configure DHCP snooping with no option 82 on a pure layer 2 Juniper ex2300 using ELS
I have a Juniper ex2300 switch in a mostly-cisco environment (no MIST). On my cisco devices, I have DHCP snooping configured per vlan, with option 82 disabled on the access-layer switches because they ...
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1
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2k
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Routing loopback using OSPF
Here is a simple network using OSPF. Router2 has got LoopBack0 with IP address 10.0.2.1 255.255.255.0. I add this network to OSPF:
Router(config-router)#net 10.0.2.0 0.0.0.255 area 0
When I dispaly ...
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1
answer
3k
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Local Fallback Command Authorization on Cisco ASA when TACACS Server is Reachable
I have a cisco ASA I want to connect to a TACACS server for command level authorization (write and read-only access). This actually works quite good. Further, I have a local fallback user configured ...
CommunityBot
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1
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Manually specify a tunnel gateway for an IPSec VPN Connection (ASA)
I have currently got several VPN's on-premise that are setup on the outside interface and using the default gateway on the interface as an originating source of the VPN tunnel.
Although the outside ...
CommunityBot
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2
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2
answers
917
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Cisco ASA context OSPF configuration issue
I've two cisco ASA configured in active/active HA. ASA is connected to switch with port-channel.
Switch configuration:
interface Port-channel47
description ASA2
switchport mode trunk
switchport ...
CommunityBot
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1
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1
answer
86
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VPN doesn't work
I'm trying to configure VPN between 2 routers:
R1: public IP is 200.0.0.6/30 on S0/0/1, private IP are 10.0.0.0/8 and 20.0.0.0/8
R3: public IP is 210.10.0.6/30 on S0/0/0, private IP is 192.168.3.0/24
...
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2
answers
68
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Hide private IP address
DS has 7 VLANs and 7 DHCP pools respectively. There are 3 trunk links to 3 access layer switchs to share VLANs. Its VLAN interfaces and DHCP pools:
ip dhcp pool vlan10
network 192.168.10.0 255.255....
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1
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218
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Issue w/ Cisco router and failed NAT and static default route
I have a cisco router that is using a VRF to support a site to site VPN tunnel. I have added a second network to the router for non-VPN standard internet use. My problem is that my default static ...
CommunityBot
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CISCO cellular Router cannot reach network via my PC
I configured the cellular and my router is connected to the internet ping (5/5) Success
but I still cannot access the internet via PC
Here is my running-conf
Current configuration : 2271 bytes
!
! ...
CommunityBot
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2
answers
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NAT and ACL order - Cisco ASA, Palo Alto, Checkpoint
I've recently begun working with firewalls (Different brands) and what really confuses me is the order the different firewalls check the ACL and NAT rules.
For instance, allow HTTP traffic from the ...
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what is the relation between DTP and VTP?
the ideas behind VTP & DTP are different, then why do we need to make sure that the VTP domain on both sides is the same otherwise the DTP will not work?
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ACLs block connection
Here is my configuration on ISP router:
interface GigabitEthernet0/0/0
no ip address
duplex auto
speed auto
!
interface GigabitEthernet0/0/0.10
encapsulation dot1Q 10
ip address 192.168.10.1 255....
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522
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Cisco 2960L and ISR 4331 throttled WAN speeds
I have tried finding a solution to this issue and the closest I have found thus far can be found here. https://www.reddit.com/r/networking/comments/8f2sn0/throughput_limited_by_cisco_2960_switch/
My ...
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1
answer
359
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Site-to-site IPsec and rerouting to another IPsec tunnel
We have three different geo sites (SITE1, SITE2 and SITE3) and each site has PFSense firewall installed. Sites have been connected together with IPSec tunnels. Also Site2 is connected to customer ...
CommunityBot
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Can't Pass 1 VLAN Through Trunk
I have 2 Cisco switches running IOS with VLANS 20,30,40,50. On SWITCH1 I have servers on Ports 1,2&3 on VLAN 30. I also have a laptop on port 5 on the same VLAN 30 and can ping the servers. They ...
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1
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Packets failed to send to destination in static routing for parallel router topology in Cisco packet tracer
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Ok, I was trying to connect routers in a parallel topology , as shown in the figure
I've configured the IP addresses for the fast Ethernet and serial interfaces.
Here are the ...
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IPSec IKEv2 connection failure due to RSA authentication issue
I'm trying to get an IPSec/IKEv2 setup working, which was implement following this
I don't understand why, but when a client connects (StrongSwan on Android here), the session is closed because the ...
CommunityBot
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3
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1
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47
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Spanning-Tree vlan priority on a pass through switch
I am still understanding a bit about this priority for spanning-tree on VLANs. I have a SWITCH A that is the root of a VLAN. It trunks through SWITCH B with no ports on that vlan. SWITCH B trunks to ...
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15
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DNAC command accounting
We are trying to integrate DNAC with ISE purely for Tacacs. We are able to authenticate and authorize users fine via Tacacs but we are not getting any tacacs command accounting sent to ISE.
Intention ...
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105
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What issues can rise from web gui config changes then making other changes from the CLI?
I'm using a 9200L Cisco switch
If I make changes in the CLI, then I make changes in the Web interface and vice versa.
Will there be issues down the road with the config file getting corrupt or ...
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522
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Duplicated Vlan ID
I have one flat network with our data center and it is causing as a lot of issues, so i had to design a new network to separate the buildings from the data center, when I designed the new network i ...
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